Insulating-joint



(Model.) 2 Sheets-Sheet 1..

E. F. GENNBRT.

INSULATING JOINT.

No. 514,822. Patented Feb. 13, 1894.

LUZZw/eS 5 65 1700670360? (Model.) 2 Sheets-Sheet 2.

E. F. GENNERT. INSULATING JOINT.

No. 514,822. Patented Feb. 13,1894.

UNITED STATES PATENT OFFICE.

EMIL F. GENNERT, OF BROOKLYN, NEIV YORK.

INSULATING-JOINT.

SPECIFICATION forming part of Letters Patent No. 514,822, dated February 13, 1894.

Application filed August 10,1893. Serial No. 482,836. (Modeh) To all whom it may concern:

Be it known that I, EMIL F. GENNERT, a citizen of the United States, residing atBrook- 1yn,in the county of Kings and State of New York, have invented certain new and useful Improvements in Insulating-Joints and Couplings for Sections Generally, of which the following is so full, clear, and exacta description as will enable those skilled in the art to which my invention appert-ains to make and use the same, reference being had to the accompanying drawings, in which Figure 1 represents a longitudinal section of myimprovements. Fig. 2shows a cup and joint in side elevation showing the parts provided with corresponding projections and de pressions to prevent turning. Figs. 3 and 4 are similar views showing flanges raised on the outside to prevent turning. Fig. 5 is a side elevation of pipes with cup removed.

The object of my invention is to provide an insulating joint and couplings for sections generally by the use of which all drilling and tapping and bolts for securing the two sections together are entirely dispensed with.

Another object of my invention is to provide an insulating joint by the use of which all turning and distortion of the sections of pipe will be obviated. It is well understood that it is of the greatest importance in the placing of fixtures of this character that all twisting and turning of the joints on each other be positively prevented. Otherwise, the twisting of wires and consequent shortcircuiting as well as the escape of gas would be both expensive, dangerous, and a great source of annoyance and discomfort. The insulation may consist of red fiber, mica, or any other suitable insulating material which may be desired.

In the accompanying drawings, A designates one section of the coupling and B the other section of the coupling. A cup-shaped casing ring 0 is adapted to slide over one of the sections while the opposite end is adapted to be spun, stamped or pressed down from the opposite fiange of the opposite section of the coupling and the two couplings are separated by a strip of insulating material D. The flanges of the cup-shaped ring are separated from the projecting flanges of the sections of the coupling, by strips of insulating material F, F.

It is obvious that the ring O need not entirely encircle the sections as a clamp or 001- lar would be formed of any portion over half of the ring which would do the work when spun over at the open end or edge.

In Fig. 2 H H designate projections of the ends of the sections, while I designates the corresponding depression in the opposite section. It will be seen at a glance that when these two sections are coupled firmly together it will be impossible for them to turn upon each other.

In Fig. 3 J, J, designate flanges raised on the outside of the sections to prevent the turning of the sections as above explained. This is a modified form which may be used without departing from the spirit of my invention.

The improvements consist in coupling the parts without the use of bolts or screws. The flanged nipple and insulation are placed within the cup and the cup is closed in by any suitable dies, tools designed for this purpose. The inner extension insulation may be dispensed with, without interfering with the present invention.

This invention is especially designed as an improvement on the invention described in Letters Patent No. 430,846, dated June 24-, 1890, granted to myself.

The strips of insulation F, F, serve to insulate the sections of the coupling from the cupshaped ring, and hence the cup-shaped ring is entirely insulated from the couplings at both sides and is thus prevented from coming into electrical contact with any outside metal or conductor which would cause short circuiting.

Having described the objects, uses, and advantages of my invention, whatI believe to be new and of my invention and what I wish to secureby Letters Patent of the United States and what I therefore claim, is-

1. As an improvement in insulating joints, the combination of the two sections provided at adjacent ends with lateral flanges with a continuous cup-sh aped covering ring embracing said flanges and an insulation between the ring and the sections of the coupling, substantially as described.

2. As an improvement in insulating joints, the two flanged sections; in combination with a continuous cup-shaped clamping ring for securing the two together and insulating material located between the sections and between the latter and the clamping ring, substantially as and for the purpose specified.

3. As an improvement in insulating joints, two sections provided with flanges, adapted to interlock for the purpose of preventing rotation relatively to each other in combination with strips of insulating material separating entirely the two contiguous ends and flanges of the coupling, and a cup-shaped ring adapted to be pressed and clamped over the sections to hold them together, and strips ot'insulating material located between. the cup shaped ring or casing and the sections, substantially as and for the purposes specified.

4. As an improvement in insulating joints two sections of pipe; in combination with a separate or independent ductile-metallic cup- 25 shaped ring, havingan opening through it for the passage of a part of one of the sections of pipe, and the upper flangeof the cupshaped ring adapted to be spun up to clamp the sections together, and insulating material 0 between the sections and the ring, substantially as described.

5. As an improvement in couplings, two sections (provided with flanges); in combination with a clamp or collar which is bruised, spun, or upset over the flanges and which alone holds itself in place and holds the sections together, substantially as described.

In testimony whereof I aflix my signature in the presence of two witnesses.

EMIL F. GENNERT.

Witnesses:

J. A. LEHMAN, J. F. CUNNINGHAM. 

